321 research outputs found
René Géronimo Favaloro : pioneer of Cardiac Surgery
No full textDr. René G. Favaloro moved to the Cleveland Clinic in 1962 and proceeded to reshape the face of cardiac surgery as we knew it. Together with his colleagues at the Cleveland Clinic, Drs. Effler, Sones, Proudfit, Groves, Sheldon and countless others, he contributed to the double internal mammary arterymyocardial implantation by the Vineberg method, and by May 1967, he reconstructed the right coronary artery by the saphenous vein graft interposition. These landmark procedures paved the way for the aorto-coronary saphenous vein bypass graft in October 1967. Many similar breakthroughs ensued, with the application of the bypass technique to the left coronary artery, the combination of coronary artery bypass graft with left ventricular reconstruction and valve repair/replacement and finally, by December, a double bypass to the right coronary artery and anterior descending branch of the left coronary artery. In June, 1971, Dr. Favaloro decided to leave the Cleveland Clinic and return to Argentina where he created a medical centre, a teaching unit, a research department and finally an Institute of Cardiology and Cardiovascular Surgery. This was his greatest personal ambition. Over and above his brilliant mind and craft, Dr. Favaloro was a man of integrity, courage, honesty and humility, whose name will never cease to reverberate throughout the history of medicine.peer-reviewe
Data for: Low-intensity management benefits solitary bees in olive groves
No full textThis is the data corresponding to the paper: "Low-intensity management benefits solitary bees in olive groves", published in the Journal of Applied Ecology in year 2019. For study design and sampling methods please see the paper or contact with the corresponding author
A Comparative Analysis of Soil Loss Tolerance and Productivity of the Olive Groves in the Protected Designation of Origin(PDO) Areas Norte Alentejano (Portugal) and Estepa (Andalusia, Spain)
No full textOlive groves are Mediterranean systems that occupy more than 2.5 M ha in Spain and 0.352 M ha in Portugal. Assuming the differences between both countries in terms of olive grove regulation and considering their multifunctionality, it is useful to implement agronomic indices to estimate their sustainability. The Soil Loss Tolerance Index (SLTI) and the Soil Productivity Index (SPI) are two such indices. We calculated both indices in the Protected Designation of Origin (PDO) Norte Alentejano (Portugal). The SLTI index was adapted considering specific variables of the analysed olive groves (i.e., SLTIog). The values obtained were compared with those previously estimated for PDO Estepa (Spain). The negative impacts of erosion and the underlying agricultural practices on the sustainability of olive groves became evident, resulting in decreased soil productivity at the regional level. The SLTIog index showed higher values for crops, being a more realistic tool to analyse sustainability. A higher soil loss tolerance was detected for integrated groves in the PDO Norte Alentejano than for PDO Estepa due to the shorter age of olive cultivation in Portugal, with incipient soil impacts. These indices provide information on the degree of soil erosion, allowing farmers and decision-makers to apply practices to maximise the sustainability of olive groves.To the University Complutense of Madrid, for awarding the lead author a short-term fellowship through which this research could be carried out. To MED-Universidade de Évora (Portugal), for providing to the main author with the opportunity to jointly perform field work and analytical tasks in Portugal. The time devoted by J.M.-R. and T.P.-C. to retrieve and treat the data and to write and revise the article has received partial funding from the following sources: (a) FCT—Foundation for Science and Technology (Portugal) under the Project UIDB/05183/2020; (b) SUSTAINOLIVE research project (https://sustainolive.eu/?lang=en [accessed on: 29 March 2021]), funded by the PRIMA EU program. Lastly, we thank María Aurora Rodríguez Sousa for her support and advice
Data for: Low-intensity management benefits solitary bees in olive groves
No full textThis is the data corresponding to the paper: "Low-intensity management benefits solitary bees in olive groves", published in the Journal of Applied Ecology in year 2019. For study design and sampling methods please see the paper or contact with the corresponding author
Wind farm energy: Design Synthesis Exercise Spring 2011; Group S12: Final report
No full textThis technical report was written as a part of the Design Synthesis Exercise (DSE), part of the third year Aerospace Engineering Bachelor curriculum of the Delft University of Technology. Ten students, together forming DSE group S12, have worked together for eleven weeks to come to this result. The report describes the design of an innovative system to increase wind farm efficiency. After reading this report, the reader should understand the design process and the design itself. When reading this report, some prior knowledge of the working principles of wind farms, economics, aerodynamics and structures is helpful to fully understand the content and derivations. However, without this prior knowledge the general outline should be understandable for most readers.Aerospace EngineeringAerodynamics, Wind Energy & Propulsio
Valuing Transgenic Cotton Technologies Using a Risk/Return Framework
No full textStochastic Efficiency with Respect to a Function (SERF) is used to rank transgenic cotton technology groups and place an upper and lower bound on their value. Yield and production data from replicated plot experiments are used to build cumulative distribution functions of returns for nontransgenic, Roundup Ready, Bollgard, and stacked gene cotton cultivars. Analysis of Arkansas data indicated that the stacked gene and Roundup Ready technologies would be preferred by a large number of risk neutral and risk averse producers as long as the costs of the technology and seed are below the lower bounds calculated in this manuscript.cotton, financial risk, market value, SERF, transgenic, Agribusiness, Crop Production/Industries, Risk and Uncertainty, Q12, Q16,
C.P. Library
No full textA joint exhibition as part of the British Textile Biennial curated by the Westminster Menswear Archive as part of a series of activities commemorating the 50th anniversary of Italian sportswear brand C.P. Company.
Three cabinets displayed a variety of artefacts, including early examples of the brand's knitwear and outerwear with accompanying press books; a cabinet showcasing various technical artefacts from the late 1990s' Urban Protection range; and a display of 12 issues of the iconic C.P. Company magazine, which was first published in 1985.
The exhibition also featured a series of paintings by Adil Amin depicting young Asian men from Blackburn wearing C.P. Company and a series of photographs by photographer Neil Bedford as part of the Portrait Youth project led by staff from the Manchester Metropolitan University's Manchester Fashion Institute
3.12 Inspection and Monitoring of Composite Aircraft Structures
No full textThe new generation of civil aircraft, including the Airbus A380 and the Boeing 787, are composed of composite materials for their primary aircraft structures. This presents a challenge for airline maintenance, repair, and overhaul (MRO) operations in both the short- and long-term. In the short-term, new technologies are needed for maintenance, monitoring, and repair techniques to cope with accidental damage that aircraft suffer throughout their lifetime. The short-term challenge also extends to manufacturing facilities and the need for quality checks of composite components, together with substructures assembled using adhesive bonding, co-curing and thermoplastic welding. As these A380 and B787 aircraft age, they will be subject to normal wear and tear and will undergo C and D checks to maintain airworthiness. At this stage of their lifetime it will be important to perform efficient and cost-effective maintenance and repair techniques to reduce lifetime costs. This chapter first describes composites materials and structures, together with an overview of expected failure modes. It will then provide an overview of current and emerging nondestructive testing (NDT) and structural health monitoring (SHM) technologies and describe some of the challenges in inspection and monitoring of composite aircraft structures.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Structural Integrity & Composite
Modelling of Ultrasonic Array Signals in Anisotropic Media
No full textThere has been a steady increase of composites and anisotropic materials in primary aircraft structures over the years. This increase is driven by the high strength to weight ratio of such materials leading to lighter and more efficient aircraft. As the uptake of such materials keeps increasing so does the complexity in geometry and manufacture of the parts which use these materials. As in the case of any structural component, these structures suffer from defects during manufacture and from damage inservice and have to be tested using nondestructive methods regularly. A plethora of NDT techniques exist for testing aircraft structures with ultrasonic NDT being a staple in the industry. Testing using single element transducers is being replaced by phased arrays as phased arrays can be used in different testing configurations such as beam steering or using phased arrays to capture the signals and then post process the data to form an image. Phased array testing of isotropic materials has been carried out for a number of years with a lot of research being devoted to the testing of such materials. The testing of isotropic materials is relatively less complicated than for anisotropic materials due to the constant material properties throughout the material, the types of defects or failures which such structures suffer and the effect of the material properties on the ultrasonic beam propagating through it or on the output signals. This leads to a simpler interpretation and easier understanding of results when such structures are tested. On the other hand testing of anisotropic materials is complicated by the fact that the material properties are not the same in every direction. The anisotropic nature of such materials has an effect on the ultrasonic beam propagation and output signals which makes the interpretation and understanding of the output more difficult. The layered structure of the composite materials also leads to multiple reflections and reverberations of the layers during inspection which are properties of the laminate, array parameters etc. leading to noise in the output signals and noise in the image. Due to this ultrasonic NDT remains a bottleneck in the further implementation of composites in aircraft structures. Understanding the effect of these various parameters experimentally would require dozens of experiments with different isolated parameters. To overcome the need for this enormous experimental campaign, modelling and simulations can be carried out to help understand these effects. There has been progress in the NDT community on the adoption of modelling methodologies to simulate the predict the response of the inspected material to the wave passing through it and the output signals which are generated. The numerical models already developed have been applied to a variety of scenarios and to different complex geometries but become quite computationally expensive as the material and inspection procedure complexity increases and take hours of runtime when run on personal computers. Some analytical and semi-analytical models which have been applied are restricted either in geometry, require the numerical evaluation of multiple integrals, are computationally expensive or do not take into consideration the array parameters or are singular when interacting with different geometries.Structural Integrity & Composite
Correction: Driving change from ‘the middle’: middle leading for site based educational development
No full textWhen this article was first published, the first author affiliation was duplicated for all four authors.No Full Tex
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